Sioux Center Police released information about the charges against 35-year-old Curtis Van Dam Wednesday, according to WHO. The alleged abuse happened while Van Dam taught at Sioux Center Christian School.

The investigation began October 18th after a police received a complaint claiming Van Dam had abused a student. During the investigation, police learned that several children had allegedly been abused by Van Dam, with the earliest incident happening in August of 2013.

Van Dam was originally charged in October with one count of lascivious acts with a child and one count of lascivious conduct with a minor.

He now faces 14 counts of sexual exploitation by a teacher, 72 counts of 2nd degree sexual abuse, 12, counts of 3rd degree sexual abuse, three counts of lascivious acts with a child, 34 counts of lascivious conduct with a minor, and five counts of indecent exposure.

Police say their investigation into further alleged incidents continues and more charges could be filed.